HYDRAULIC DEVICE

PROBLEM TO BE SOLVED: To provide a hydraulic device capable of speeding up pressure relief particularly in the hydraulic device of a large-sized machine with a large volume of a liquid on the side of the load. SOLUTION: A first check valve 15 is provided in a first line 10 connected with a first pum...

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Bibliographic Details
Main Author MIYAGI JUNICHI
Format Patent
LanguageEnglish
Published 09.06.2011
Subjects
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
HEATING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PRESSES
PRESSES IN GENERAL
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
TRANSPORTING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a hydraulic device capable of speeding up pressure relief particularly in the hydraulic device of a large-sized machine with a large volume of a liquid on the side of the load. SOLUTION: A first check valve 15 is provided in a first line 10 connected with a first pump 11 so that the flow from the first pump 11 to a main engine hydraulic circuit 5 is forwarded. A differential pressure valve 6 is provided to be connected with the upstream-side portion 10a of the first check valve 15 of the first line 10 and the downstream-side portion 10b of the first check valve 15 of the first line 10. The differential pressure valve 6 ejects the hydraulic oil in the downstream-side portion 10b when a value obtained by subtracting the upstream-side pressure Pa in the upstream-side portion 10a from the downstream-side pressure Pb in the downstream-side portion 10b becomes larger than a given value Ps. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20090268947